Solid state communications vol:80 issue:12 pages:1017-1020
The Mossbauer effect in Sn-119 was applied to obtain information on the local dynamical properties in frozen rare gases. The results show a hardening of the phonon spectrum for the matrix isolated tetramethyl tin molecule in neon and argon. No such enhancement is observed for the matrices of solid krypton and xenon. An explanation based on geometrical considerations is proposed.